> I have occasionally seen net source that passes "-Wall -Werror" but so
> far nothing has passed this;
> 
> CFLAGS = -ansi -Wall -Wshadow -Wpointer-arith -Wcast-qual -Wwrite-strings \
>          -Wstrict-prototypes -Wmissing-prototypes -funsigned-char \
>          -Dscanf=DONT_USE_SCANF -Dgets=DONT_USE_GETS -Werror

Indeed I'd be surprised if anything can.

StunOS doesn't include prototypes for all functions in the Sun library that
are also standard C.  Under these conditions, getting missing-prototypes
to work properly is impossible.